Cheap Flights London to Buenos Aires from £448

Flight FAQs

• Which airlines offer the cheapest flights from London to Buenos Aires?

  Based on Trip.com data, avianca offers Cheapest nonstop one-way flights from £448 (for example, LHR–EZE on Wed, Oct 28). For a Cheapest nonstop return flight, ITA Airways offers fares from £802, departing on Thu, Nov 19 and returning on Thu, Nov 26.

• Which airlines offer direct flights from London to Buenos Aires?

  At the moment, you can catch a direct flight from London to Buenos Aires with the following airlines, including: Ryanair TAP Air Portugal easyJet Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from London to Buenos Aires?

  A flight from London (LON) to Buenos Aires (BUE) takes an average of 16 hours 55 minutes.

• When is the best time to book flights from London to Buenos Aires?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from London to Buenos Aires is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there from London to Buenos Aires each week?

  On average, 6 direct flights operate each week between London and Buenos Aires. See below the schedules of the main airlines serving this route:
  British Airways: S/M/T/W/T/F/S – BA249 (departure at 22:12) Iberia: S/M/T/W/T/F/S – IB3608 (departure at 22:12)

• How can I find the best deals on flights from London to Buenos Aires?

  Here are some tips for finding the best flight deals from London to Buenos Aires on Trip.com:
  · Be flexible with your travel dates. The cheapest flight is currently on Wed, Oct 28, with one-way fares from just £448.
  · Compare airlines. British Airways currently offers the lowest fares on this route.
  · Set up a price alert to track fare changes without searching every day.
  · Check Trip.com regularly for flight deals and available promo codes.
  · Avoid peak season or book early. July is generally the busiest month for travel to Buenos Aires.
  · Get exclusive promo codes on the Trip.com app.

• When is the best time to book a flight from London to Buenos Aires to get the best price?

  The cheapest month to book a flight from London to Buenos Aires is usually September, when demand is lower.

• Which upcoming date is the cheapest for flights from London to Buenos Aires?

  After crunching the numbers on our October flight calendar, it's currently cheapest to fly from London to Buenos Aires on October 12, 2026 with avianca, with prices starting at £810.

• Which airports should you choose for flights from London to Buenos Aires?

  Flights to Buenos Aires can arrive at: Jorge Newbery Airport (AEP) and Ezeiza International Airport (EZE). The most common route connects Heathrow Airport and Jorge Newbery Airport (LHR–AEP).

• What is the time difference between London and Buenos Aires?

  The time difference between Buenos Aires and London is 3h.

• How can I change or cancel my flight ticket from London to Buenos Aires?

  Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average price of a one-way flight from London to Buenos Aires?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from London to Buenos Aires is £1,030. Fares vary by travel date, airline and availability.

• What is the average price of a return flight from London to Buenos Aires?

  Based on Trip.com data for flights departing in the next 30 days, the average return fare from London to Buenos Aires is £1,688. Fares vary by travel date, airline and availability.

• How do I book flights from London to Buenos Aires on Trip.com?

  Enter London and Buenos Aires, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveller details and complete payment to receive your confirmation.

• Are there budget airlines on the London to Buenos Aires route?

  Ryanair and easyJetare the most popular budget airlines flying from London to Buenos Aires. Check baggage, seat and payment fees before comparing the final price.